code: def test_builder_to_backend_symbolic(self, use_cpu_only, backend):
      # TODO: variadic (rdar://59559656)
  
      s0 = get_new_symbol()
  
      val = np.array(
          [[1.0, 2.0, 3.0], [4.0, 5.0, 6.0]], dtype=np.float32
      )
      input_placeholders = {"x": mb.placeholder(shape=(s0, 3))}
      input_values = {"x": val}
  
      def build(x):
          return [
              mb.reduce_argmax(x=x, axis=1, keep_dims=True),
              mb.reduce_argmin(x=x, axis=0, keep_dims=True),
          ]
  
      expected_output_types = [
          (s0, 1, types.int32),
          (1, 3, types.int32),
      ]
      expected_outputs = [
          np.array([[2], [2]], dtype=np.int32),
          np.array([[0], [0], [0]], dtype=np.int32),
      ]
  
      run_compare_builder(
          build,
          input_placeholders,
          input_values,
          expected_output_types,
          expected_outputs,
          use_cpu_only=use_cpu_only,
          frontend_only=False,
          backend=backend,
      )
  
file_path: turicreate/src/external/coremltools_wrap/coremltools/coremltools/converters/mil/mil/ops/tests/test_reduction.py
imports: import scipy
  from coremltools.converters.mil import testing_reqs
  from coremltools.converters.mil.mil import get_new_symbol
  from coremltools.converters.mil.testing_reqs import *
  from .testing_utils import run_compare_builder
label_desc: Use image node_id 5 for calling the TestReduction obj's underlying member method code with example usage: obj.test_builder_to_backend_symbolic(use_cpu_only, backend) and returns: list